Circuit/System Description
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
For an overview of the component/system, refer to: Fuel System Description
| Circuit | Description |
|---|---|
| Control - Terminal 1 | The output circuit is switched to 50 V to activate the component. |
| Control - Terminal 2 | The output circuit is switched to ground to activate the component. |
| Component | Description |
|---|---|
| K20 Engine Control Module | The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data and adjusts the engine actuators accordingly. |
| Q17 Fuel Injector | Fuel injectors are solenoid valves that inject fuel either into the intake system or directly into the cylinder. The amount of fuel injected depends on the length of the electrical pulse that is applied. |
The engine control module calculates the injected fuel quantity in two different ways:
- Fuel quantity based on the time the injector was turned on.
- Fuel quantity based on the increase in crankshaft speed when a specific cylinder fires.